Double-girder Bridge Cranes: the Efficient and Reliable Choice for Heavy-duty Operations
In heavy manufacturing, metallurgy, ports, and large assembly workshops, the demand for heavy-tonnage, high-precision, and high-safety material handling is increasingly urgent. Our double-girder bridge cranes, with their professional configuration of double-girder structure, independent control cab, and main and auxiliary hooks, provide you with stable, efficient, and safe heavy-duty lifting solutions.
Technical Parameters：
Standard Version (General Industrial Grade)：
| Rated Lifting Capacity | Main Hook: 5t / 10t / 16t / 20t / 32t / 50t Auxiliary Hook: 3t / 5t / 8t / 10t / 16t Main and auxiliary hooks cannot be used simultaneously. |
| Span | 10.5m - 31.5m Standard step distance 0.5m, customizable |
| Lifting Height | Main Hook: 12m - 30m Auxiliary Hook: 14m - 32m Customizable according to workshop height. |
| Working Class | A5 / A6 A5 is suitable for general machinery manufacturing, A6 is suitable for metallurgical auxiliary applications |
| Lifting Speed | Main Hook: 3.5 - 7.5 m/min Auxiliary Hook: 7 - 15 m/min Variable frequency speed control allows for micro-speed function |
| Power supply | Sliding contact line power supply, 380V 50Hz three-phase AC |
| Safety devices | Lifting capacity limiter, travel limiter, buffer, anti-disengagement device, rail clamp (outdoor use) All standard, conforming to national/European standards |
Heavy-duty customized version (heavy equipment/metallurgical grade)：
| Rated lifting capacity | Main hook: 63t / 80t / 100t / 125t / 160t / 200t / 320t Auxiliary hook: 20t / 32t / 50t / 63t Suitable for heavy forging, nuclear power, wind power |
| Span | 18m - 35m Adopts box-type double beam welded structure, annealed to relieve stress |
| Lifting height | Main hook: 16m - 40m Auxiliary hook: 18m - 42m |
| Working class | A7 / A8 |
| Lifting speed | Main hook: 0.8 - 5 m/min Auxiliary hook: 2 - 10 m/min Fully variable frequency control with precise positioning function |
| Operation method | Enclosed air-conditioned cab equipped with industrial air conditioning, shock-absorbing seat, and linkage control console |
| Special configurations | Overload protection, torque limiter, wireless video monitoring, fault self-diagnosis system Optional anti-sway system to improve lifting stability |
Core Design Highlights
1. Double-girder structure: Stable load-bearing capacity, fearless of heavy loads
High-strength main beams: Welded from high-quality alloy steel, undergoing rigorous stress testing and flaw detection, capable of withstanding heavy loads and operating smoothly without deformation.
Anti-torsional and anti-bending design: The parallel double-girder structure effectively distributes the load, improving the overall rigidity of the machine. It maintains excellent stability when lifting ultra-long and ultra-heavy workpieces, eliminating the risk of tilting.
Long-life rail system: Combined with high-precision wheels and rails, it has low running resistance and low wear, suitable for high-frequency, high-intensity operation scenarios.
2. Independent Control Cabin: Comfortable View, Precise Control
Panoramic Operating Space: The control cab features a large tempered glass area, providing a 360° unobstructed view. Operators can clearly monitor the entire lifting process, significantly improving operational accuracy.
Ergonomic Design: Equipped with an adjustable seat, integrated control console, and shock absorption devices, the interior effectively reduces fatigue during prolonged operation, enhancing work comfort.
Upgraded Safety Protection: The control cab features a sealed and soundproof design, effectively isolating workshop noise and dust. It is also equipped with emergency escape devices and a fall protection system, ensuring comprehensive personnel safety.
3. Main and Auxiliary Hooks: Flexible Adaptability, Efficient Collaboration
Main Hook Heavy-Duty Capacity: The main hook's rated lifting capacity covers large tonnage requirements (customizable up to hundreds of tons). It uses high-strength steel wire rope and pulley blocks, specifically designed for lifting heavy workpieces (such as large equipment, steel billets, and molds).
**Precise Auxiliary Hook Operation:** The auxiliary hook has a moderate lifting capacity, enabling light-load, fast, and precise lifting operations. It can be used for auxiliary positioning, workpiece flipping, or lifting small accessories, forming a highly efficient synergy with the main hook.
**Intelligent Linkage Control:** Supports independent or linked operation of the main and auxiliary hooks, allowing for flexible mode switching according to operational needs. This significantly improves operational efficiency under complex conditions and reduces process waiting time.
**Applicable Scenarios:**
Heavy Manufacturing: Assembly and handling of heavy equipment such as large machine tools, presses, and wind power equipment.
Metallurgical Industry: Cross-workshop transfer and process coordination of materials such as steel billets, steel coils, and rolls.
Port Logistics: Loading, unloading, and storage of containers and large components.
Energy Engineering: Lifting of heavy equipment in large-scale projects such as hydropower stations and nuclear power plants.
**Core Value:**
**Efficiency Upgrade:** Dual-hook collaborative operation can reduce lifting process time by more than 30%, adapting to high-cycle production demands.
**Safe and Controllable:** Multiple safety protection devices (overload limit, travel limit, anti-derailment, etc.) mitigate lifting risks from the outset.
** Cost optimization: High-strength structural design and low maintenance costs extend equipment lifespan and reduce total lifecycle investment.
Flexible customization: Span, lifting height, and control methods can be customized according to workshop layout, load requirements, and operating conditions.